Package com.emc.mongoose.base.data

Class CachedDataInput

java.lang.Object

com.emc.mongoose.base.data.DataInputBase

com.emc.mongoose.base.data.CachedDataInput

All Implemented Interfaces:

DataInput, java.io.Closeable, java.lang.AutoCloseable

Direct Known Subclasses:

ExternalDataInput, SeedDataInput

public class CachedDataInput
extends DataInputBase

Created by andrey on 24.07.17. The data input able to produce the layer of different data using the given layer index. Also caches the layers using the layers count limit to not to exhaust the available memory. The allocated off-heap memory is calculated as layersCacheCountLimit * layerSize (worst case)

Nested Class Summary

Nested classes/interfaces inherited from interface com.emc.mongoose.base.data.DataInput

DataInput.Type

Field Summary

Fields inherited from class com.emc.mongoose.base.data.DataInputBase

inputBuff

Constructor Summary

Constructors

Constructor	Description
CachedDataInput()
CachedDataInput(CachedDataInput other)
CachedDataInput(java.nio.ByteBuffer initialLayer, int layersCacheCountLimit, boolean isInHeapMem)

Method Summary

Modifier and Type	Method	Description
void	close()
java.nio.ByteBuffer	getLayer(int layerIndex)
java.lang.String	toString()

Methods inherited from class com.emc.mongoose.base.data.DataInputBase

getSize

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

CachedDataInput

public CachedDataInput()

CachedDataInput

public CachedDataInput(java.nio.ByteBuffer initialLayer,
                       int layersCacheCountLimit,
                       boolean isInHeapMem)

CachedDataInput

public CachedDataInput(CachedDataInput other)

Method Detail

getLayer

public final java.nio.ByteBuffer getLayer(int layerIndex)
                                   throws java.lang.OutOfMemoryError

Specified by:

getLayer in interface DataInput

Specified by:

getLayer in class DataInputBase

Throws:

java.lang.OutOfMemoryError

close

public void close()
           throws java.io.IOException

Specified by:

close in interface java.lang.AutoCloseable

Specified by:

close in interface java.io.Closeable

Overrides:

close in class DataInputBase

Throws:

java.io.IOException

toString

public final java.lang.String toString()

Overrides:

toString in class java.lang.Object